<html>
<body>
<p>Test postMessage and garbage collection.</p>
<div id=result></div>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}

var worker = new Worker('resources/messageport-echo-worker.js');

worker.onmessage = (event) => {
    if (event.data === "ready") {
        worker.terminate();
        setTimeout(() => {
            document.body.innerHTML = "PASS";
            if (window.testRunner)
                testRunner.notifyDone();
        }, 0);
    }
}

var channel = new MessageChannel();
channel.port1.onmessage = function(event) {
}

worker.postMessage("Here is your port", [channel.port2]);

</script>
</body>
</html>